Renowned for their reliability, robustness and ease of use. Excellent teaching aids for teaching digital logic And Boolean algebra at all levels

"... with their accompanying booklets, these well designed units provide sufficient material
for most introductory courses in the subject... Handbooks deserve a special word.
That on Combinational circuits introduces basic ideas of binary logic and two-state
systems with familiar examples and lead to complex ideas about gates and circuits.
....Sequential circuits are dealt with in the other book which provide one of the
rare introductions to the subject which can be regarded as suitable for the beginners." - Times
Education Supplement